2.2 Vietnamese koi (Anabas testudineus) in a commercial farm.

Haque et al. (2017) conducted a thesis to determine the growth
performance of Vietnamese koi (Anabas testudineus) in a commercial farm.
The authors examined the water quality parameter in the experimental period,
and found the average temperature 22.53±0.60, 21.24±.1.20 and 22.62±0.45°C in
treatment T1, T2 and T3 respectively. The
average values of pH content of the water body in T1, T2 and
T3 were 7.45±0.36, 7.60±0.26 and 7.62±0.23, respectively. The
average values of dissolved oxygen of the water in treatment T1, T2
and T3 were 4.77±0.18, 4.77±0.18 and 4.79±0.14 mg/l, respectively.

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Ahmed et al.
(2014) conducted a research to estimate the comparative growth study of Vietnam koi (Anabus testudineus) and Thai koi (Anabus testudineus).
The authors examined the water quality parameter in the experimental period,
and found the average temperature were 29.78 in VT1, 30.42 in VT2, 30.50
in TT1 and 29.99°C in TT2, dissolved oxygen were 7.21,
7.42 , 7.14 and 7.34 Mg/l in VT1,
VT2, TT1 and TT2, respectively, mean pH values
were 7.42 in VT1, 7.29 in VT2, 7.50 in TT1 and
7.45 in TT2, ammonia were
0.21, 0.24, 0.28 and 0.23 mg/l in VT1, VT2, TT1
and TT2, respectively and alkalinity were 200.00, 205.00, 210.00 and 205.00 ppm in VT1,
VT2, TT1 and TT2 respectively.

Chakraborty et
al. (2014) supervised an experiment to estimate the growth, yield and
returns to koi, Anabas testudineus (Bloch, 1792) under semi-intensive
aquaculture system using different seed types in Bangladesh. Authors figured
out that water quality parameters in all the experimental ponds were within the
normal range for fish culture for water recycling method.

Roy et al.
(2013) manipulated a trial to evaluate the culture practice of Thai Koi (Anabas testudineus) with different
stocking densities. Authors figured out that water quality parameters during
the trial period and water quality was measured fortnightly. The typical temperature
was found 28.21±0.870,
28.78±0.510 and 28.76±0.780C
in conducts T1, T2
and T3respectively.
They also found the pH ranges were diverse between 7.70 to 9.10 among the three
treatments. The average values of dissolve oxygen were 5.33±0.34, 4.23±0.13,
4.16±0.14 mg/L respectively in the three successive treatments.

Habib et al.
(2015) carried out an analysis to assess the effects of stocking density on
growth and production performance of cage reared climbing perch (Anabas testudineus) of high yielding
Vietnamese stock. The calculated optimum water quality parameters by them were
as follows, mean water temperature was 29.49

0.33

, average dissolve oxygen of cage water
was 5.86

0.12 mg/l, average transparency was 38.66

0.79 cm, pH was 7.70

0.02 and ammomia- nitrogen was 0.14

0.01.

Kohinoor et
al. (2017) manipulated a research to evaluate the Evaluation of production
performances of Koi (A. testudineus),
with Shing (H. fossilis) and GIFT
Tilapia (O. niloticus) in
semi-intensive culture management. The authors observed the suitable range of
water temperature from 26.06 to 31.97 °C for fish culture. They found that
transparency between 15-40 cm appropriate for fish culture. The observed pH values
by them of water ranging from 7.1-8.9 indicated that the experimental ponds were
suitable for fish culture. Most suitable range of DO in a water body for fish
culture was suggested from 5.0-8.0 mg/L by them. Their result showed that the
variations in total alkalinity in all the treatments were found in productive
range for aquaculture ponds. They observed that the suitable range of
ammonia-nitrogen in fish culture less than 0.1 mg/l and ammonia nitrogen
content were higher that might be due to higher stocking density in all the
treatments.

Rahman and Monir (2013) calculated the physico-chemical conditions of
nine nursery ponds located at the Freshwater sub-station, Bangladesh Fisheries
Research Institute, Saidpur, Nilphamari. The researchers logged the average
values of different water quality parameters were, water temperature 29 to 33 °C, transparency 31 to 58 cm, dissolved oxygen 3.4 to 6.2 mgL-1,
pH 6.8 to 8.5, alkalinity 95 to 185 mgL-1 and NH4-N 0 to
1 mgL-1.

Kohinoor
et al. (1998) monitored that the
water quality parameters in six research ponds. The authors declared the
average values of water quality parameters such as, water temperature (°C), transparency (cm), pH, dissolved oxygen (mgL-1),
and
ammonia nitrogen (mgL-1) were 27.72±0.01, 32.58±2.401, 7.18±0.06,
4.20±0.12, and 0.12±0.02 respectively.

Adhikary et al. (2009) carried out an experiment to justify the growth
Performance of Thai Koi (Anabas testudineus) In Integrated Culture
System. They found the following water quality parameters: water temperature of
the integrated pond was 27.85±1.21OC and normal pond 28.45±1.32OC, Dissolved
oxygen was found to be within 5.5 to 8.5
mg/l, pH values were almost neutral
(6.8-7.5), Alkalinity of water was found
81 to 127 mg/l and total alkalinity was measured in T1 (107.25±16.58
mgCaCO3/l).

Wahab et al. (1995) calculated a
number of water quality parameters in nine trial ponds at Bangladesh Agricultural
University campus. They logged that the water temperature vary between 22 to
32.4°C, Transparency 50 cm, pH was at all times around 6.0 and DO was always
low and assorted between 2.2 to 7.5 mg/L.

Hossain (2000) calculated the effect of
organic and inorganic fertilizers on water quality parameter of fish pond. He finished
that the water quality parameter assorted considerably among the treatments and
the temperature varied with a range of 22-33°C, transparency 26.52 cm,
dissolved oxygen 3.8-6.9mg/L and pH 6.8-8.2 total alkalinity 40- 80 mg/l amongst
three treatments.

Kohinoor (2000) calculated some
physico-chemical parameter in carp polyculture with small indigenous fish
species. He logged that the range of water temperature was 24.2 to 33.3°C,
transparency 12-15 cm Do 2.0-7.5 mg/L and pH was 6.9-8.6 among the treatments.

Chowdhury (2000) studied the comparative
abundance of benthos in fertilized and unfertilized ponds and establish that
the different groups of benthic organisms were maximum in fertilized ponds and
minimum in unfertilized ponds. The ideals of water quality parameters such as
temperature, transparency, and pH and dissolve oxygen were within the
productivity range during the study age.

2.3
Growth performance

Haque et al. (2017) conducted a thesis to determine the growth
performance of Vietnamese koi (Anabas testudineus) in a commercial farm.
The authors examined the growth performance of Vietnamese koi and found the
mean length 13.70±0.03, 13.64±0.02 and 13.58±0.01 cm in treatments T1,
T2, and T3, respectively and mean weight gain (g)
90.00±2.000, 88.00± 1.000 and 86.02±1.020 g for T1, T2 and
T3, respectively. The production was found to be 83.57 kg/dec in T1,
followed by T2 (83.60 kg/dec) and T3 (84.01 kg /dec),
respectively.

Ahmed et al. (2014) conducted a research to estimate the comparative growth study of Vietnam
koi (Anabus testudineus) and Thai koi
(Anabus testudineus).
The authors examined the
growth performance and found the best weight gain of 80.00 g was observed in VT1, mean weight gain (g) were 0.83, 0.88, 0.51
and 0.61; SGR (per day) were 3.93, 3.95, 3.65 and 3.71%; FCR were 1.50, 1.67,
1.70 and 1.90; survival rate were 78.50, 76.50, 90.00 and 82.00% and fish
production were 7,839, 15,923, 5,519 and 11,820 kg/ha/3 months in VT1,
VT2, TT1 and TT2, respectively.

Sarker et al. (2014) organized a trial to price out the economics of Thai
Koi (Climbing Perch, Anabas testudineus)
farming in pond in Bangladesh. The authors found that the Weight per day gain
of fish was slower for sinking or mixed feed than the floating feed users and the
best FCR value was also gained for the floating feed. The study also exposed
that the usual production charge of producing per kg Thai koi was lower for
floating feed compared to other feed technologies.

Habib et al. (2015) carried out an analysis to assess the effects of
stocking density on growth and production performance of cage reared climbing
perch (Anabas testudineus) of high
yielding Vietnamese stock. They found SGR and FCR that were best for fish in T2.The
highest harvesting weight was obtained in T2 and highest survival
rate was observed in T2.

Adhikary et al. (2009) carried
out an analysis to assess the growth Performance of
Thai Koi (Anabas testudineus) In Integrated Culture System. They found
the following growth performance: T1 (59.73±4.22 g) showed weight
gain followed by T2 (48.22±10.74 g), Mean length gain for T1
was (12.75±1.50 cm) and for T2 (12.22±1.73 cm) and SGR (%/day) in T1
(3.51) and T2 (3.31).